Music output from chg port vs headphone jack

Is there any diff in the quality of the sound if you connect to your car's AUX input from the bottom/charge port vs connecting from the headphone jack? I have cords for both and have read conflicting opinions.
I've tried both and I can't tell much difference. Is there any reason not to use the bottom/charge connection other than not being able to charge while listening?
Message was edited by: lostsol
Message was edited by: lostsol

In some laptops, there is a difference. For example, the headphone port might compress the sound, whilst the line out doesn't. Also, the voltages and/or impedances might be different, as they are intended to drive different sources. So you might notice a change in sound quality if the headphone port has some sort of compression applied. Or you might notice that the volume is lower using the line out. This is pure speculation as I haven't tried using the iPhone line out, and don't know what if any compression is applied to the iPhone headphone out. I'd be interested in your experiences if you'd like to report back once you've tried it?
Cheers.
Message was edited by: jia10

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Music output from chg port vs headphone jack

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